WCDMA vs GSM
GSM (Global System for Mobile communication) is a digital mobile telephony system that is widely used in Europe and other parts of the world. GSM uses a variation of time division multiple access (TDMA) and is the most widely used of the three digital wireless telephony technologies (TDMA, GSM, and CDMA).
1-WCDMA stands for Wideband Code Division Multiple Access, and is the 3G technology, as defined by the ITU's IMT-2000 spec, that is used by UMTS and NTT DoCoMo's FOMA network. WCDMA makes use of many core CDMA technologies created by Qualcomm, though not nearly as many as do regular CDMA carrier networks
What is the best
Gem use only 2.5 or 2 g mode for the internet and wcdma use the 3g mode so it more faster